JPH09106867A - Electric connection structure using tape wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a certain contact status by tape wire. SOLUTION: Plural conductive wire stripes 11 having their spring characteristics are arranged, these stripes are pinched by a resin holding tape 12, and a tape wire 10 in which the conductive wire stripes are exposed to both ends thereof is obtained. In addition, a reinforce plate 13 with its high rigidity made of synthetic resin is adhered to a holding tape 12 part of this tape wire 10 by means of adhesive. Such a tape wire with the reinforce plate is arranged between a top and a bottom printed circuit boards 20 and 30, the lower end of the conductive wire stripe 11 is soldered to the lower side printed circuit board 20, and a bending part 11a is formed to bring the upper end thereof into contact with a contact point part 31 with spring characteristics. Flexible deformation of the tape wire 10 is restricted by adhering the reinforce plate 13, and a function for lead-in guide and positioning for each conductive wire stripe 11 can be given by providing the reinforce plate 13 with a recess part 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection structure using a tape electric wire having a connector function.

[0002]

2. Description of the Related Art Tape electric wires are generally used for connecting and wiring printed circuit boards of electronic equipment by a large number of parallel circuits, and are manufactured so as to have flexibility as much as possible in consideration of handling of wiring work. Has been done. The specific structure is such that a large number of flexible conductive wires such as annealed copper wires and twisted wires are arranged in parallel and covered with a tape of soft vinyl chloride resin or the like.

Conventionally, in order to connect printed circuit boards using such a tape electric wire, the structure shown in FIG. 8 has been generally used. For example, one end of the tape electric wire 2 is soldered to one printed circuit board 1 and the connector 3 is connected to the other end of the tape electric wire 2. And
The other printed circuit board 4 has a board-mounted connector 5
Is fixed by soldering, and the connector 3 of the tape electric wire 2 is fitted and connected to the connector 5.

[0004]

However, the above-mentioned conventional tape electric wire has only the function of securing a conductive path, and is provided with a connector function of, for example, directly connecting to a contact of another electric circuit. Was difficult. In order to connect to another electric circuit, it is necessary to elastically contact the contact portion of the counterpart circuit with a predetermined contact pressure.
As shown in, it is necessary to connect the connector 3 to the end portion of the tape electric wire 2 and make a connection through the terminal fitting having a spring property built in the connector 3. However, since the connector 3 as described above is configured by accommodating a plurality of terminal fittings in the connector housing, the connector housing is molded with resin, and the terminal fittings are punched from a spring metal plate and bent. However, there is a problem in that there is a large limit to the cost reduction because the wire has to be manufactured by a complicated process of crimping the wire and housing it in the connector housing.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electrical connection structure which can obtain a reliable contact state at a low cost by using a tape electric wire.

[0006]

The invention according to claim 1 for achieving the above object is an electrical connection structure for connecting electrical circuits formed on a circuit board by a tape wire, wherein the tape wire is , A plurality of conductive wires having spring characteristics arranged at intervals along a predetermined direction, and both ends of the conductive wires are exposed and attached to hold the conductive wire group in an aligned state. A holding tape made of synthetic resin, the end of the conductive wire comes into contact with the contact portion of the other side electric circuit with a contact pressure based on its spring characteristic, and a reinforcing plate is provided on the side surface of the holding tape. It is characterized by being arranged.

According to a second aspect of the present invention, in the first aspect of the invention, a supporting leg portion that abuts on the circuit board is formed so as to project from an end portion of the reinforcing plate. is there.

Further, the invention according to claim 3 is the invention according to claim 1 or 2, wherein the reinforcing plate is notched with a positioning recess for restraining an end of the conductive wire within a predetermined range. It is characterized by that.

[0009]

According to the invention of claim 1, the conductive wire of the tape electric wire comes into contact with the contact portion of the circuit board to connect the electric circuits. Here, since the conductive wire of the tape electric wire has a spring characteristic, it can be brought into contact with the contact portion of the other side electric circuit with a contact pressure necessary for electric connection,
The tape electric wire itself exerts the connector function, and the connector as a separate component can be eliminated. Also, since the reinforcing plate is arranged on the side surface of the tape wire, the deformation of the tape wire is restricted,
This stabilizes the contact state.

Further, according to the invention of claim 2, since the reinforcing plate is supported by the supporting leg portion projecting at the end thereof, it is supported in a stable posture with respect to the substrate.

Further, according to the invention of claim 3, the end portion of the conductive wire is brought into contact with the contact portion of the circuit board while being guided into the recess of the reinforcing plate. As a result, the conductive wire is guided and positioned by the recess.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows the overall structure of a tape electric wire 10 according to the present invention. As the conductive wire 11, various materials can be used as long as they are conductive wires having spring characteristics. For example, a phosphor bronze wire is preferable, and it is more preferable that it is plated with solder, tin, gold or the like. In addition, copper alloys such as beryllium copper and copper containing iron, iron-based alloys such as piano wires and stainless wires, and clad wires in which a copper core is coated with a nickel layer can be used.

On the other hand, the holding tape 12 is made of synthetic resin, and both ends of the conductive wire 11 are exposed in order to hold a plurality of conductive wires 11 arranged at intervals along a predetermined direction. In this state, the conductive wire 11 is attached so as to be sandwiched from both sides. Various synthetic resins can be used as the material, for example, a PET film or a composite resin film obtained by laminating PVC and PET is preferable, and a flame-retardant material is particularly preferable. To more specifically exemplify one embodiment, the conductive wire strip 11 is a solder-plated phosphor bronze wire having a diameter of 0.65 mm and a length of 31 mm, and for example, seven wires are arranged at a pitch of 2.5 mm. The holding tape 12 is PV as shown in FIG.
A laminate film composed of a C film 12a and a PET film 12b, the PVC film 12a side being stuck to sandwich the conductive wire 11, and in that state, the thickness is 1.05 mm, the length is 19 mm, and the width is 17.5 mm. The conductive wire 11 is exposed on both sides by about 6 mm, for example.

In order to manufacture the above-mentioned tape electric wire 10, the conductive tapes 11 wound around a plurality of drums are lined up along a predetermined direction and drawn out, and the intermediate part thereof is intermittently sandwiched by a film and held vertically. The group of conductive wires 11 may be fixed by 12 and then the conductive wires 11 may be cut between the holding tapes 12. Both end sides of the conductive wire strip 11 are exposed from the holding tape 12 as described above, and the lower end side in the figure is exposed in a linear shape, but the upper end side is exposed to approximately 3/3 as shown in FIG. A bent portion 11a having an arc shape of four circles is formed.

A reinforcing plate having a high rigidity made of a synthetic resin material (such as polypropylene resin or polyethylene resin) is attached to one side surface of the holding tape 12 of the above-mentioned tape electric wire 10 by an adhesive. The reinforcing plate 13 is formed to have substantially the same width and length as the holding tape 12, and a supporting leg portion 14 projects outward at the lower end edge in the figure, and is placed on the upper surface of the printed circuit board 20 to support the whole. Is being done. On the other hand, at both ends of the upper edge of the reinforcing plate 13 in the drawing, a pair of protrusions 15 are formed to form a recess 16 in the center. The concave portion is formed to have a width substantially equal to that of the region corresponding to the area where the conductive wire group 11 is provided, and each bent portion 11a side of the conductive wire group 11 is introduced. In addition, both protrusions of the reinforcing plate 13 are provided on the upper side of the printed circuit board 3 in the figure.
The bent portion 11a of each conductive wire strip 11 is set to have a length that slightly protrudes from both the projecting portions 15 in a natural state.

In order to connect the electric circuits using the tape electric wire 10, for example, the structure shown in FIG. 5 can be used. In the figure, reference numerals 20 and 30 denote two printed circuit boards arranged vertically in the case 40, which are inserted into and fixed to the positioning grooves 41 and 42 formed in the side wall of the case 40. Conductor circuits (not shown) are respectively formed on the printed circuit boards 20 and 30 by printed wiring means, and required electronic parts are mounted to form electronic circuits. Then, the lower end side of each conductive wire strip 11 in the drawing is inserted into the through hole 21 of the lower printed circuit board 20 and soldered to the land 22, whereby the tape electric wire 1 is formed.
0 stands up perpendicularly to the printed circuit board 20. And the upper printed circuit board 3
0, the contact portion 31 on the lower surface by printed wiring means.
Is formed, and the bent portion 11a of the conductive wire 11 is in contact therewith.

In the above structure, since the conductive wire 11 has a spring characteristic, the side surface of the bent portion 11a makes contact with the contact portion 31 of the printed circuit board 30 for electrical connection because of the elastic deformation of the bent portion 11a. Contact with pressure. As a result, the tape electric wire 10 functions not only as a conductive path but also as a connector for the printed circuit board 30, and the board-mounted connectors 3 and 5 of the conventional structure shown in FIG. 8 are unnecessary. Therefore, it is possible to significantly reduce the cost.

Furthermore, since the deformation of the tape electric wire 10 in the falling direction is restricted by the reinforcing plate 13, the bending portion 11
The contact state between a and the contact portion 31 becomes stable. In addition, the reinforcing plate 13 itself is also supported by the support legs 14 to form the printed circuit board 20.
Since it is set in a stable posture with respect to, it further contributes to the stabilization of the above-mentioned contact situation. Furthermore, the reinforcing plate 1
Since the concave portion 16 is formed in the portion 3 and the bent portion 11a side of each conductive wire strip 11 is introduced therein, each conductive wire strip 11 is guided by the guiding process at the same time,
The pull-out position is restricted within the range, and the contact at the regular position is ensured without being accidentally scattered by the contact with the peripheral members. <Second Embodiment> FIG. 6 shows a second embodiment of the present invention. Here, two tape electric wires 10 are directly overlapped with their holding tape 12 portions, and a pair of reinforcing plates 13 are provided from both sides thereof. It was sandwiched between. Similar to the first embodiment, the reinforcing plate 13 and the holding tape 12 are attached with an adhesive.

The other structure is the same as that of the first embodiment, so that the same operational effect can be exhibited. <Third Embodiment> FIG. 7 shows a third embodiment of the present invention. In the third embodiment as well, similarly to the second embodiment, a reinforcing plate 13 is arranged outside two tape electric wires 10. This is an example of the case. As shown in this figure, the same number of introduction recesses 13a are arranged in a notched shape at the upper edge of the reinforcing plate 13 in accordance with the arrangement pitch of the conductive wires 11. And
Each bent portion 11a of the conductive wire 11 is guided to each introduction recess 13a and positioned so that the bent tops thereof are maintained at a constant interval.

Other structures are the same as those of the first and second embodiments, and thus the same effects can be exhibited.

The present invention is not limited to the embodiments described with reference to the above description and the drawings. For example, the following embodiments are also included in the technical scope of the present invention. Various changes can be made without departing from the scope of the present invention.

(1) In any of the embodiments, the two upper and lower printed circuit boards 20 and 30 are connected by the tape electric wire 10. However, the present invention is not limited to this. The printed circuit boards 20 and 30 may be connected by the tape electric wire 10. Also, 2
The tape electric wire 10 may be used as a jumper wire in one printed circuit board 20 without being limited to the connection between the printed circuit boards.

(2) In the above embodiment, one end of the conductive wire strip 11 is soldered to the printed circuit board 20, but the invention is not limited to this. May be formed, and each bent portion 11a may be elastically contacted with the printed circuit boards 20 and 30. In this case, in order to hold the tape electric wire 10, an appropriate holder for holding the tape electric wire 10 in the rising state may be attached to one printed circuit board 30.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall structure of a tape electric wire.

[Figure 2] Cross section of tape wire

FIG. 3 is a perspective view of the tape electric wire with a bent portion formed.

FIG. 4 is a perspective view showing a state in which a reinforcing plate is arranged on one side of a tape electric wire.

FIG. 5 is a cross-sectional view showing a connection state to a circuit board.

FIG. 6 is a perspective view showing a second embodiment.

FIG. 7 is a perspective view showing a third embodiment.

FIG. 8 is a perspective view showing a conventional connection structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Tape electric wire 11 ... Conductive wire 12 ... Holding tape 13 ... Reinforcing plate 14 ... Support leg 16 ... Recesses 20, 30 ... Printed circuit board

Claims (3)

[Claims] 1. An electric connection structure for connecting electric circuits formed on a circuit board by a tape electric wire, wherein the tape electric wires have a plurality of spring characteristics arranged at intervals along a predetermined direction. It is composed of a conductive wire and a holding tape made of synthetic resin adhered by exposing both ends of the conductive wire so as to hold the conductive wire group in an aligned state, and the ends of the conductive wire are opposed to each other. An electrical connection structure using a tape electric wire, characterized in that it comes into contact with a contact portion of a side electric circuit with a contact pressure based on its spring characteristic, and a reinforcing plate is arranged on a side surface portion of the holding tape. 2. The electrical connection structure using a tape electric wire according to claim 1, wherein a supporting leg portion that abuts on the circuit board is formed to project at an end portion of the reinforcing plate. . 3. The method according to claim 1, wherein
An electric connection structure using a tape electric wire, characterized in that a recess for positioning which restrains an end portion of the conductive wire within a predetermined range is cut out in the reinforcing plate.